How to Create a Subdomain for my Domain

It is not always necessary to register a new domain name if you already have one and you are interested to have a separate site apart from the main one.

Rather than registering a new domain name, you can always create a subdomain using a domain you already own, for example blog.domain.tld or forum.domain.tld (assuming you already hold domain.tld). You can also add multiple levels of subdomains, for instance info.blog.domain.tld.

Subdomains are extensions of your domain name that you can forward to URLs or point to IP addresses instead of purchasing additional domains. Usually, they are used for segmentation or verification of different services associated with a domain name.

- Select A Record for Type and enter the Host you would like to point to an IP address:

Or

Subdomain that points to a IP address of the destination hostname

It is possible to point a subdomain to another domain name with the help of CNAME record or ALIAS record.

The
important difference is that ALIAS can coexist with other records on
that name. ALIAS record can also be used if you wish to alias the
root domain to another service (which you cannot do with a CNAME
record).

- Select CNAME Record for Type, put your desired Host and enter the record itself (e.g., ghs.googlehosted.com) into Value:

- Select ALIAS record for Type, enter the Host and the destination hostname (e.g., example.com) into Value:

Subdomain that forwards to a link/URL

- Select URL Redirect Record for Type, enter the Host and the destination link/URL into the Value line. Select Unmasked/Masked/Permanent (301) depending on the Forward type:

Or

Subdomain that points to a server name

- Select NS Record for Type and enter the Host you would like to point to a server:

Or

- Check the Save All Changes button once done:

Normally, it takes 30 minutes for newly created records to take effect.

Catch-all (wildcard) subdomain

Wildcard subdomains allow you to point or redirect all non-existing subdomains to a valid page on a website.
In order to create a wildcard subdomain, follow the instructions here.

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